/* UrbanKit Studio — articles dark editorial theme
 * Driven by /brand/tokens.css (Claude Design v18 FINAL LOCK)
 * Civic blue #1320E5 · warm rust #D9522C · hard radii 0/2/4
 * Archivo (display) · Inter (body) · Fraunces (editorial italic) · JetBrains Mono (mono)
 */

:root {
  --uk-bg-0:   #06070A;
  --uk-bg-1:   #0A0B0E;
  --uk-bg-2:   #14171C;
  --uk-bg-3:   #1A1E25;

  --uk-fg-0:   #F2F1ED;
  --uk-fg-1:   #C9C8C2;
  --uk-fg-2:   #8A8983;
  --uk-fg-3:   #5C5B57;

  --uk-line-0: #2A2D34;
  --uk-line-1: #3A3D44;

  --uk-accent:        #1320E5;
  --uk-accent-text:   #5862F7;
  --uk-accent-glow:   rgba(88, 98, 247, .18);

  --uk-warm:        #E8744E;
  --uk-warm-text:   #F39570;
  --uk-warm-glow:   rgba(243, 149, 112, .14);

  --uk-warn: #E8B045;
  --uk-err:  #E84545;
  --uk-ok:   #16A55E;

  --uk-display:  "Archivo", "Inter Tight", ui-sans-serif, system-ui, sans-serif;
  --uk-sans:     "Inter", ui-sans-serif, system-ui, sans-serif;
  --uk-serif:    "Fraunces", ui-serif, Georgia, serif;
  --uk-mono:     "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  background: var(--uk-bg-1);
  color: var(--uk-fg-0);
}

body {
  font-family: var(--uk-sans);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* hairline grid — subtle, calmer than the React landing page */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(to right, rgba(58, 61, 68, .35) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(58, 61, 68, .35) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: .25;
  mask-image: radial-gradient(ellipse at top, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at top, #000 30%, transparent 80%);
}

.container {
  position: relative;
  z-index: 1;
  max-width: 760px;
  margin: 0 auto;
  padding: 32px 24px 96px;
}

/* ---------- header / chrome ---------- */
header {
  position: relative;
  margin-bottom: 48px;
  padding: 12px 0 20px;
  border-bottom: 1px solid var(--uk-line-0);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.logo {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  color: var(--uk-fg-0);
}

.logo img {
  display: block;
  height: 36px;
  width: auto;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  align-items: center;
}

nav a {
  color: var(--uk-fg-2);
  text-decoration: none;
  font-family: var(--uk-mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  padding: 4px 0;
  border-bottom: 1px solid transparent;
  transition: color .15s ease, border-color .15s ease;
}

nav a:hover {
  color: var(--uk-fg-0);
  border-bottom-color: var(--uk-accent-text);
}

@media (min-width: 720px) {
  header {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

/* ---------- breadcrumbs ---------- */
.breadcrumb {
  font-family: var(--uk-mono);
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--uk-fg-3);
  margin-bottom: 24px;
}

.breadcrumb a {
  color: var(--uk-fg-2);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.breadcrumb a:hover {
  color: var(--uk-fg-0);
  border-bottom-color: var(--uk-line-1);
}

/* ---------- editorial kicker ---------- */
.kicker {
  display: block;
  font-family: var(--uk-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--uk-warm-text);
  margin-bottom: 16px;
}

/* ---------- typography ---------- */
h1 {
  font-family: var(--uk-display);
  font-weight: 700;
  font-size: clamp(32px, 5vw, 48px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--uk-fg-0);
  margin: 0 0 20px;
}

h2 {
  font-family: var(--uk-display);
  font-weight: 700;
  font-size: 24px;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--uk-fg-0);
  margin: 56px 0 16px;
  padding-top: 8px;
  position: relative;
}

h2::before {
  content: "";
  position: absolute;
  top: -8px;
  left: 0;
  width: 32px;
  height: 1px;
  background: var(--uk-accent-text);
}

h3 {
  font-family: var(--uk-display);
  font-weight: 600;
  font-size: 17px;
  line-height: 1.3;
  letter-spacing: 0;
  color: var(--uk-fg-0);
  margin: 32px 0 12px;
  text-transform: uppercase;
  letter-spacing: .04em;
}

article p {
  font-family: var(--uk-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--uk-fg-1);
  margin: 0 0 18px;
  max-width: 70ch;
}

article > p:first-of-type,
article p:first-of-type {
  /* lede paragraph keeps the body voice — no italic by default */
}

article ul,
article ol {
  margin: 12px 0 24px 24px;
  color: var(--uk-fg-1);
  max-width: 70ch;
}

article li {
  margin-bottom: 8px;
  line-height: 1.7;
}

article li::marker {
  color: var(--uk-fg-3);
}

strong { color: var(--uk-fg-0); font-weight: 600; }

em { font-family: var(--uk-serif); font-style: italic; color: var(--uk-warm-text); font-variation-settings: "opsz" 60, "SOFT" 100; }

article a {
  color: var(--uk-accent-text);
  text-decoration: none;
  border-bottom: 1px solid var(--uk-line-1);
  transition: color .15s ease, border-color .15s ease;
}

article a:hover {
  color: var(--uk-fg-0);
  border-bottom-color: var(--uk-accent-text);
}

article a[rel="author"] {
  color: var(--uk-fg-1);
}

/* ---------- meta line under title ---------- */
.meta {
  font-family: var(--uk-mono);
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--uk-fg-2);
  margin: 0 0 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--uk-line-0);
}

.meta a {
  color: var(--uk-fg-1);
  text-decoration: none;
  border-bottom: 1px solid var(--uk-line-1);
}

.meta a:hover { color: var(--uk-fg-0); }

/* ---------- index page subtitle (Fraunces editorial dek) ---------- */
.subtitle {
  font-family: var(--uk-serif);
  font-style: italic;
  font-size: 20px;
  line-height: 1.4;
  color: var(--uk-fg-1);
  font-variation-settings: "opsz" 60, "SOFT" 100;
  margin: 0 0 48px;
  max-width: 60ch;
}

/* ---------- article list (index) ---------- */
.article-list { list-style: none; margin: 0; padding: 0; }

.article-item {
  border-top: 1px solid var(--uk-line-0);
  padding: 28px 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
}

.article-item:last-child {
  border-bottom: 1px solid var(--uk-line-0);
}

.article-title {
  font-family: var(--uk-display);
  font-weight: 700;
  font-size: 22px;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0;
}

.article-title a {
  color: var(--uk-fg-0);
  text-decoration: none;
  border-bottom: none;
  transition: color .15s ease;
}

.article-title a:hover {
  color: var(--uk-accent-text);
}

.article-desc {
  font-family: var(--uk-sans);
  font-size: 15px;
  line-height: 1.6;
  color: var(--uk-fg-1);
  margin: 0;
  max-width: 70ch;
}

.article-meta {
  font-family: var(--uk-mono);
  font-size: 11px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--uk-fg-3);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 4px;
}

/* tag pills — hard edges, no soft pastels */
.tag {
  display: inline-block;
  padding: 3px 8px;
  font-family: var(--uk-mono);
  font-size: 10px;
  letter-spacing: .12em;
  text-transform: uppercase;
  background: transparent;
  border: 1px solid var(--uk-line-1);
  color: var(--uk-fg-2);
  border-radius: 0;
}

.tag-howto      { color: var(--uk-accent-text); border-color: var(--uk-accent-text); }
.tag-explainer  { color: var(--uk-fg-1);        border-color: var(--uk-fg-2); }
.tag-comparison { color: var(--uk-warm-text);   border-color: var(--uk-warm-text); }

/* ---------- callouts ---------- */
.tip,
.warning,
.info,
.symptom,
.fix {
  border-left: 2px solid var(--uk-accent-text);
  background: var(--uk-bg-2);
  padding: 16px 20px;
  margin: 28px 0;
  border-radius: 0 2px 2px 0;
  font-size: 15px;
  line-height: 1.65;
  color: var(--uk-fg-1);
}

.tip       { border-left-color: var(--uk-ok); }
.tip strong{ color: var(--uk-ok); }

.warning   { border-left-color: var(--uk-warm-text); }
.warning strong { color: var(--uk-warm-text); }

.info      { border-left-color: var(--uk-accent-text); }
.info strong { color: var(--uk-accent-text); }

.symptom   { border-left-color: var(--uk-warn); }
.symptom strong { color: var(--uk-warn); }

.fix       { border-left-color: var(--uk-ok); }
.fix strong { color: var(--uk-ok); }

/* ---------- specs / example boxes ---------- */
.specs,
.example {
  background: var(--uk-bg-2);
  border: 1px solid var(--uk-line-0);
  padding: 20px 24px;
  margin: 28px 0;
  border-radius: 2px;
}

.specs h3 { margin-top: 0; color: var(--uk-fg-0); }
.specs ul { margin-left: 20px; }
.example-title { font-family: var(--uk-mono); font-size: 11px; text-transform: uppercase; letter-spacing: .1em; color: var(--uk-fg-2); margin-bottom: 8px; }

/* ---------- TOC ---------- */
.toc {
  background: var(--uk-bg-2);
  border: 1px solid var(--uk-line-0);
  padding: 16px 16px 16px 36px;
  margin: 24px 0 32px;
  border-radius: 2px;
}

.toc::before {
  content: "Contents";
  display: block;
  font-family: var(--uk-mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--uk-fg-2);
  margin: 0 0 8px -20px;
}

.toc ol, .toc ul {
  margin: 0 0 0 0;
  color: var(--uk-fg-1);
}

.toc li { margin-bottom: 4px; }

/* ---------- code ---------- */
code {
  font-family: var(--uk-mono);
  font-size: 0.92em;
  background: var(--uk-bg-3);
  color: var(--uk-fg-0);
  padding: 2px 6px;
  border: 1px solid var(--uk-line-0);
  border-radius: 2px;
}

pre {
  background: var(--uk-bg-0);
  color: var(--uk-fg-1);
  padding: 18px 20px;
  margin: 18px 0 24px;
  overflow-x: auto;
  border: 1px solid var(--uk-line-0);
  border-radius: 2px;
  font-family: var(--uk-mono);
  font-size: 13px;
  line-height: 1.6;
}

pre code {
  background: transparent;
  border: 0;
  padding: 0;
  color: inherit;
  font-size: inherit;
}

/* JSON syntax highlighting tokens (used by what-is-geojson.html) */
.comment { color: #6A9955; }
.string  { color: var(--uk-warm-text); }
.number  { color: var(--uk-ok); }
.key     { color: var(--uk-accent-text); }

/* ---------- tables ---------- */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 14px;
  font-family: var(--uk-sans);
  border: 1px solid var(--uk-line-0);
}

th, td {
  border: 1px solid var(--uk-line-0);
  padding: 10px 14px;
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--uk-bg-2);
  color: var(--uk-fg-0);
  font-weight: 600;
  font-family: var(--uk-mono);
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
}

td {
  color: var(--uk-fg-1);
}

/* ---------- CTA ---------- */
.cta {
  background: var(--uk-bg-2);
  border: 1px solid var(--uk-line-1);
  border-left: 2px solid var(--uk-accent-text);
  padding: 24px;
  margin: 36px 0;
  text-align: left;
  border-radius: 0 2px 2px 0;
}

.cta p {
  margin: 0 0 8px;
  color: var(--uk-fg-1);
  font-family: var(--uk-sans);
  font-size: 15px;
  max-width: none;
}

.cta p:last-child { margin-bottom: 0; }

.cta a {
  color: var(--uk-accent-text);
  font-family: var(--uk-display);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: .04em;
  text-transform: uppercase;
  text-decoration: none;
  border-bottom: 1px solid var(--uk-accent-text);
  padding-bottom: 2px;
}

.cta a:hover {
  color: var(--uk-fg-0);
  border-bottom-color: var(--uk-fg-0);
}

/* ---------- figures ---------- */
figure {
  margin: 28px 0;
  text-align: center;
}

figure svg {
  max-width: 100%;
  height: auto;
  border: 1px solid var(--uk-line-0);
  background: var(--uk-bg-2);
  border-radius: 2px;
}

figcaption {
  font-family: var(--uk-mono);
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--uk-fg-3);
  margin-top: 12px;
  text-align: center;
}

/* ---------- footer ---------- */
footer {
  margin-top: 80px;
  padding: 24px 0;
  border-top: 1px solid var(--uk-line-0);
  color: var(--uk-fg-3);
  font-family: var(--uk-mono);
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
}

footer p { margin: 0 0 6px; color: var(--uk-fg-3); max-width: none; }

footer a {
  color: var(--uk-fg-2);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

footer a:hover {
  color: var(--uk-fg-0);
  border-bottom-color: var(--uk-line-1);
}

/* ---------- selection ---------- */
::selection {
  background: var(--uk-accent);
  color: var(--uk-fg-0);
}

/* ---------- focus ---------- */
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--uk-accent-text);
  outline-offset: 3px;
  border-radius: 0;
}